Added a test for logger.go
Added a test for logger.go

codegangsta/negroni,zackkitzmiller/negroni,Festum/negroni,GrimDerp/negroni,tinvyhxx/negroni,futurechallenger/negroni,Wattpad/negroni,aperera/negroni,sangheestyle/negroni,trigrass2/negroni,panjunjie/negroni,urfave/negroni,mikeqian/negroni,squiidz/negroni,abhishekgahlot/negroni